Lgsfdesign’s Post

What is Capacity Design? Capacity design is a key part of designing structures for seismic resistance. Capacity design ensures structures undergo controlled ductile behaviour to avoid brittle failure during an earthquake. The structural engineer will decide which elements of the structure will yield under seismic load based on the selected structural system. These elements are known as dissipative items. IDEA StatiCa Connection analyses the connection on the applied load and shows where the plasticity forms. Applied load for capacity design (usually the capacity of the dissipative item) is dictated by the respective building code. Plastic hinges should only form in the selected dissipative item (beams or bracings). Non-dissipative items (including connection’s bolts, welds and plates) shall remain elastic. IDEA StatiCa Connection offers all important considerations for capacity design: 🔸Check if plasticity only occurs in the dissipative item 🔸Prequalified connections templates for special and intermediate steel moment frames for seismic applications (AISC 358) 🔸Prequalification checks (design code edition, system and connection types) (AISC 358) Check out this article to learn more about capacity design: https://lnkd.in/gvxK9bzP #ideastatica #structuralengineering #capacitydesign

If I could sum up Structural Engineering in ONE WORD, it'd be STIFFNESS - A beam connected at one end to a shear wall is overstressed. Reason? Stiffness - A shorter column is more overstressed than a longer one. Reason? Stiffness - What differentiates a primary beam from a secondary beam given they are both casted monolithically? Stiffness - You see that a Column is overstressed and its required rebar percentage is high so you increase its size. However, it still shows somewhat similar or even greater rebar percentage. Reason? Stiffness The definition and formula of Stiffness is so simple yet this one small concept governs majority of the structural concepts What more applications of this concept can you guys think of? If you're from a different field, do you have such a single core concept which can sum up your entire field? #CivilEngineering #StructuralEngineering #Stiffness

Structural analysis is important as it provides a basis for structural design and also it evaluates whether a specific structural design will be able to withstand external and internal stresses and forces. Prota Structure is one of the most useful tools for structural analysis and design. #structuralengineering #Protastructures

🔩 𝗨𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱𝗶𝗻𝗴 𝘁𝗵𝗲 𝗥𝗼𝗹𝗲 𝗼𝗳 𝗧𝗶𝗲𝘀 𝗶𝗻 𝗖𝗼𝗻𝗰𝗿𝗲𝘁𝗲 𝗖𝗼𝗹𝘂𝗺𝗻𝘀 🔩 In structural engineering, ties (also known as ligs, stirrups, transverse reinforcement) in concrete columns play a crucial role, yet their function is often misunderstood. Here’s a deep dive into their purpose and how optimizing their use can lead to significant benefits: Primary Function: - Unlike in beams, ties in columns don't primarily resist shear and torsion. - They prevent buckling of longitudinal reinforcement and provide confinement, enhancing the column's strength and ductility. Optimization Opportunities: - Though longitudinal reinforcement is the main steel in columns, ties can constitute 10-30% of the total steel weight. - Optimizing ties can reduce this by over 10%, minimizing material use and cost. Shear and Torsion: - Columns typically experience minimal shear and torsion compared to compressive forces. - Significant torsion in columns often indicates a design error. 🎥 𝗖𝗵𝗲𝗰𝗸 𝗼𝘂𝘁 𝘁𝗵𝗶𝘀 𝘃𝗶𝗱𝗲𝗼 where I inspect the reinforcement of columns. Pay close attention to how the ties are secured to the longitudinal bars and how the bars are tied to the starters. 👉 𝗦𝗵𝗮𝗿𝗲 𝘁𝗵𝗶𝘀 𝗽𝗼𝘀𝘁 if you think your connections will find it useful. Cheers! #StructuralEngineering #ConcreteDesign #ConstructionOptimization #CivilEngineering #BuildingDesign

I would like to bring to your attention and readers that the statement "Plastic hinges should only form in the selected dissipative item (beams or bracings). Non-dissipative items (including connection’s bolts, welds and plates) shall remain elastic" is applicable only for fully restrained connections where the beam-to-column connections are designed to have a resistance larger than the plastic moment of resistance of the connected beam. However, for partial-strength (also semi-rigid) connections (allowed by modern seismic codes in seismic areas) with their resistance lower than beam capacity, dissipative zones are located in connections. In such cases, the dissipative action is allowed only in END PLATES (part of connection) with the beam remaining elastic during seismic excitation.

In structural engineering, columns are vertical members that mainly support compressive loads. The classification of columns as short or long is determined by their slenderness ratio, which compares the column's length to its least radius of gyration. 1. Short Column: + Short columns are those with a relatively small length compared to their cross-sectional dimensions. +They are mainly subjected to compressive stresses and typically fail due to material crushing or buckling instability. +These columns are less likely to buckle, and their design focuses more on material strength than buckling concerns. +Their behavior is well understood and can be analyzed using basic engineering equations. 2. Long Column: +Long columns have a length significantly greater than their cross-sectional dimensions. +They are more prone to buckling due to their slenderness, with failure often attributed to buckling rather than material crushing. +Design of long columns is frequently influenced by buckling considerations over material strength. +Understanding the behavior of long columns involves analysis of various buckling modes and critical buckling loads. The primary difference between short and long columns is their slenderness ratio and the prevalent failure mode. Short columns have a lower slenderness ratio, tend to experience material crushing, and are less prone to buckling. On the other hand, long columns have a higher slenderness ratio, are more susceptible to buckling, and their design is typically guided by considerations related to buckling. #Columns #LongColumns #CivilEngineering #StructuralEngineering #EngineeringDesign #Construction #Infrastructure #StructuralDesign

Join Us for the Final Webinar in the Advancing Structural Design for Infrastructure Projects Series! 🚀 We’re excited to invite you to the last session of our three-part webinar series, focusing on the Complete Workflow of Designing a Concrete Structure. Mark your calendars: https://lnkd.in/gZzg64jJ for Tuesday, August 27, 2024, at 11:00 AM IST. Webinar Synopsis: Learn how RAM Structural System’s specialist loading and analysis features, including pattern loading, construction stage analysis, and more, can help advance your projects. Understand the direct interoperability between RAM Structural System and STAAD Advanced Concrete to design the columns, shear walls and beams of a concrete structure, and learn the interoperability between RAM Structural System and RAM Concept to design the flat slabs and mat foundation. Agenda 1) The time saving workflows for modeling, creating loads, analysis, and design of your structure 2) How to design, optimize reinforcement, and create reinforcing schedules with STAAD Advanced Concrete 3) How to utilize a finite element analysis and design approach to your slab design with RAM Concept 🔗 Register Here: https://lnkd.in/gZzg64jJ #StructuralDesign #ConcreteStructure #STAAD #RAM #Engineering #Infrastructure #Construction #DesignOptimization

Base isolation refers to a technique used in structural engineering to protect buildings and other structures from the potentially damaging effects of ground vibrations during earthquakes or other dynamic events. It involves the installation of flexible or resilient materials between the foundation (base) of the structure and the ground, effectively decoupling the superstructure from the ground motion. Common materials used for base isolation include rubber bearings, laminated elastomeric bearings, or friction pendulum bearings. Base isolators are special engineering devices used in earthquake zones to protect buildings from damage during earthquakes. They essentially act as shock absorbers for structures, isolating them from the shaking ground. There are two main types of base isolators: 1.Elastomeric bearings: These are the most common type and are made of thick layers of rubber vulcanized between steel plates. They function by deflecting horizontally during an earthquake, lengthening the building’s vibration period and reducing the forces transmitted to it. 2.Friction pendulum bearings (FPBs): These isolators use a curved sliding surface and a pendulum effect to create a restoring force and dissipate energy through friction. Main dynamic effects of base isolation on the super structure includes: (1) increasing the natural period of the structure (2) decreasing acceleration responses, as well as inter-story displacements. #earthquake #earthquakedesign #concretedesign #steelstructures #concrete #civilengineering #structuralengineering #structure #steel #construction #arhitecture #civil #civilengineer #civilconstruction #engineering #engineer #inovation #engineeringstudent #engineeringstudents #dynamics #structuralanalysis #Resilience #Building #DisasterMitigation #Engineering #Innovation #baseisolators #Technology #Design

Types of loads on structural members in a building Dead Load: Represents the self-weight of all elements (structural and non-structural) in the structure. To calculate dead load: For slabs: Multiply density by material thickness. For beams: Multiply density by width and height of the cross-section. For columns: Multiply density by width, height, and length of the column 1. Live Load: Refers to movable loads like people, furniture, and equipment. It varies based on building function and occupancy. Engineers consider live load when designing for safety . Wind Load: Accounts for lateral forces due to wind. It depends on building height, shape, and location. Wind load calculations involve complex formulas and standards . Snow Load: Relevant in regions with snowfall. It considers the weight of accumulated snow on roofs and other surfaces . Earth Pressure: Applies to retaining walls and foundations. It’s the lateral force exerted by soil against the structure . Seismic Load: Considers ground motion during earthquakes. Engineers use seismic codes to design structures that can withstand seismic forces . Remember, precise calculations are crucial for safe and efficient structural design! 🏗️ #StructuralEngineering #Construction #LoadCalculations

Leveraging our fourplex analytical model made in SAFI - Structural Software for the purpose of analyzing the steel frame in a precast/steel hybrid structure. Time taken to build this model: 1 hour. #engineering #structural #buildings #housing DISCLAIMER: Models shown are conceptual models for presentation and do not show all final details. These serve as a draft and proof of concept only and are not to be imitated. These models are not to be used for construction or information.